Temperature and Activation Energy (HSC SSCE Chemistry): Flashcards
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Definition of activation energy ()
Definition of activation energy ()
Min. energy barrier reactants must overcome to form products
Symbol for activation energy
Symbol for activation energy
How activation energy is determined
How activation energy is determined
Experimentally by measuring reaction rates at various temps
Effect of larger on temperature sensitivity
Effect of larger on temperature sensitivity
Stronger response to temperature increases
What activation energy represents physically
What activation energy represents physically
Energy hill/barrier particles must climb to react
Result when particles collide with sufficient energy
Result when particles collide with sufficient energy
Overcome barrier, transform into products
Result when particles lack sufficient energy
Result when particles lack sufficient energy
Bounce apart, remain as unreacted reactants
Effect of higher on reaction rate
Effect of higher on reaction rate
Slower reaction (fewer collisions have sufficient energy)
Why higher temperature speeds up reactions
Why higher temperature speeds up reactions
More particles have energy to overcome barrier
Two conditions for successful collision (collision theory)
Two conditions for successful collision (collision theory)
Sufficient energy (exceeding ) + correct orientation